O'Conor, Piper & Flynn ERA said Whit Harvey, Greenspring and Diana Hirschhorn, Bel Air/Forest Hill, were ranked one of the top 10 nationwide ERA agents for total volume through the first six months of this year. OPF associate teams ranking in the top 10 in a similar category were: Karen Bisbee and Nancy Hubble, Greenspring; Kevin McNamara and Monica Cartwright McNamara and Dave and Cookie Stone, Reisterstown; and Ed and Bev Wisch, Ocean Pines.